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| Fluke 87V shows -OL when in ohms range - normal or not? |
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| exe:
--- Quote from: Electro Detective on July 22, 2019, 09:36:01 am ---i.e. it's looking a bit suss, don't buy it :-- --- End quote --- on the other hand, it's an opportunity to ask for a discount and have fun with repairing it :) |
| Electro Detective:
--- Quote from: exe on July 22, 2019, 09:42:21 am --- --- Quote from: Electro Detective on July 22, 2019, 09:36:01 am ---i.e. it's looking a bit suss, don't buy it :-- --- End quote --- on the other hand, it's an opportunity to ask for a discount and have fun with repairing it :) --- End quote --- I'm with you there :-+ but may be pushing the luck getting fixit docs from Fluke for an issue like this Then again, a simple CAL might sort it out :-// |
| vinyl:
My 28II show OL, but sometimes the minus sign appears and disappears immediately. |
| Brumby:
--- Quote from: exe on July 22, 2019, 09:42:21 am --- --- Quote from: Electro Detective on July 22, 2019, 09:36:01 am ---i.e. it's looking a bit suss, don't buy it :-- --- End quote --- on the other hand, it's an opportunity to ask for a discount and have fun with repairing it :) --- End quote --- ... If, in fact, it needs repair. I keep wondering if it is just a slight bias that the ADC registers as negative. With an input around zero, it would only take a poofteenth of nothing (in the wrong direction) to be classified as "negative". This is just a thought - and I cannot discount the possibility that this is indicative of a real problem - but I'd be tempted to get my hands on it and do some side-by-side comparison measurements with a known good meter. I suspect it could function within specification (assuming no other faults). |
| vinyl:
My 28II ohm auto range (60 mega ohm) momentarily shows a minus sign and disappears soon. Manual range 60Mega is the same. manual range (6 mega ohm --- 600 ohms), OL is always displayed. |
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